Looking at the different focal lengths mounted on the E-M10. Atmospheric conditions, haze, etc. Varying light in the same hour or so, different exposures and all the rest that goes with it, but its what I test the lenses on anyway. Nothing scientific, no MTF charts or lines per mm. That doesn't interest me at all to be honest and DXO I'm not All Canon FD lenses except the first shot taken with a kit lens. All the best folks and its only about the focal lengths. Danny.